plotly.Graph_object
https://plotly.com/python-api-reference/plotly.graph_objects.html
low-level interface to figures, traces and layout
Bar Chart
https://plotly.com/python/bar-charts/
Layout : https://plotly.com/python/reference/layout/

go vs. px
plotly.graph_objects (as go) vs. plotly.express (as px)
Figure 의 구조
plotly의 graph_object인 go의 Figure에는 2가지 속성 즉, Data와 Layout 이 있다.
https://github.com/santosjorge/cufflinks
